Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A method performed at user equipment (UE), comprising: in a case that (a) a common search space for a first narrowband physical downlink control channel (NPDCCH) scrambled by a Radio Network Temporary Identity (RNTI) corresponding to a Single-Cell Multicast Control Channel (SC-MCCH) is assigned within a first subframe which is configured by a system information block and (b) the first subframe is a specific subframe, monitoring, within the first subframe, the common search space for the first NPDCCH without performing specific processing; and in a case that a common search space for a second NPDCCH scrambled by an RNTI corresponding to a Single-Cell Multicast Traffic Channel (SC-MTCH) is assigned within a second subframe, receiving, within the second subframe, an SC-MCCH transmission without monitoring the common search space for the second NPDCCH, wherein the specific subframe is (a) a first specific subframe within which an SC-MTCH transmission is assigned or (b) a second specific subframe within which the common search space for the second NPDCCH is assigned, the specific processing not performed within the first specific subframe comprising receiving the SC-MTCH transmission, the specific processing not performed within the second specific subframe comprising monitoring the common search space for the second NPDCCH.
This invention relates to wireless communication systems, specifically methods for user equipment (UE) to monitor narrowband physical downlink control channels (NPDCCH) in a narrowband Internet of Things (NB-IoT) network. The problem addressed is optimizing UE power consumption and processing efficiency by selectively monitoring control channels based on subframe configurations and transmission types. The method involves UE operations in two scenarios. First, when a common search space for a first NPDCCH scrambled by a Single-Cell Multicast Control Channel (SC-MCCH) RNTI is assigned in a first subframe (configured by system information block) and the subframe is a specific type, the UE monitors the common search space without performing additional processing. The specific subframe can be either a subframe where a Single-Cell Multicast Traffic Channel (SC-MTCH) transmission is assigned or a subframe where the common search space for a second NPDCCH (scrambled by an SC-MTCH RNTI) is assigned. In the first case, the UE receives the SC-MTCH transmission without monitoring the second NPDCCH's search space. In the second case, the UE monitors the second NPDCCH's search space without receiving the SC-MTCH transmission. This selective monitoring reduces unnecessary processing, conserving UE resources.
2. A user equipment (UE), comprising: a processor; and a memory, wherein the memory stores instructions that cause the processor to: in a case that (a) a common search space for a first narrowband physical downlink control channel (NPDCCH) scrambled by a Radio Network Temporary Identity (RNTI) corresponding to an Single-Cell Multicast Control Channel (SC-MCCH) is assigned within a first subframe which is configured by a system information block and (b) the first subframe is a specific subframe, monitor, within the first subframe, the common search space for the first NPDCCH without performing specific processing; and in a case that a common search space for a second NPDCCH scrambled by an RNTI corresponding to a Single-Cell Multicast Traffic Channel (SC-MTCH) is assigned within a second subframe, receive, within the second subframe, an SC-MCCH transmission without monitoring the common search space for the second NPDCCH, wherein the specific subframe is (a) a first specific subframe within which an SC-MTCH transmission is assigned or (b) a second specific subframe within which the common search space for the second NPDCCH is assigned, the specific processing not performed within the first specific subframe comprising receiving the SC-MTCH transmission, the specific processing not performed within the second specific subframe comprising monitoring the common search space for the second NPDCCH.
This invention relates to user equipment (UE) in wireless communication systems, specifically for managing narrowband physical downlink control channel (NPDCCH) monitoring in narrowband Internet of Things (NB-IoT) networks. The problem addressed is optimizing UE power consumption and processing efficiency by selectively monitoring control channels based on subframe configurations and transmission types. The UE includes a processor and memory storing instructions to handle two scenarios. First, when a common search space for an NPDCCH scrambled by a Radio Network Temporary Identity (RNTI) for a Single-Cell Multicast Control Channel (SC-MCCH) is assigned in a subframe configured by system information, and that subframe is a specific type (either containing an SC-Multicast Traffic Channel (SC-MTCH) transmission or another NPDCCH search space), the UE monitors the common search space without performing additional processing. Second, when a common search space for an NPDCCH scrambled by an RNTI for an SC-MTCH is assigned in a subframe, the UE receives the SC-MTCH transmission without monitoring the corresponding NPDCCH search space. The specific subframes are defined as those containing SC-MTCH transmissions or NPDCCH search spaces, where the UE avoids redundant processing to conserve power and resources. This approach ensures efficient use of UE resources by dynamically adjusting monitoring behavior based on subframe content.
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December 1, 2020
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